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(PureBasic) Paraguay E-Invoicing Signed XML (SIFEN)

See more XML Digital Signatures Examples

Demonstrates how to sign XML for e-invoicing -- SISTEMA INTEGRADO DE FACTURACIÓN ELECTRÓNICA NACIONAL (SIFEN). This is for signing XML files that need to be submitted to a government agency (Country Paraguay, SIFEN / EKUATIA, Sistema Nacional de Facturacion Electrónica).

Chilkat PureBasic Module Download

Chilkat PureBasic Module

IncludeFile "CkCert.pb"
IncludeFile "CkXml.pb"
IncludeFile "CkXmlDSigGen.pb"
IncludeFile "CkXmlDSig.pb"
IncludeFile "CkStringBuilder.pb"

Procedure ChilkatExample()

    success.i = 1

    ; Create the XML to be signed...

    ; Use this online tool to generate code from sample XML: 
    ; Generate Code to Create XML

    xmlToSign.i = CkXml::ckCreate()
    If xmlToSign.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::setCkTag(xmlToSign, "rDE")
    CkXml::ckAddAttribute(xmlToSign,"xmlns","http://ekuatia.set.gov.py/sifen/xsd")
    CkXml::ckAddAttribute(xmlToSign,"xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance")
    CkXml::ckAddAttribute(xmlToSign,"xsi:schemaLocation","http://ekuatia.set.gov.py/sifen/xsd siRecepDE_v150.xsd")
    CkXml::ckUpdateChildContent(xmlToSign,"dVerFor","150")
    CkXml::ckUpdateAttrAt(xmlToSign,"DE",1,"Id","01800228774059001001501012022091519999999990")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|dDVId","0")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|dFecFirma","2022-09-15T10:23:05")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|dSisFact","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gOpeDE|iTipEmi","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gOpeDE|dDesTipEmi","Normal")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gOpeDE|dCodSeg","999999999")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gOpeDE|dInfoEmi","GENERADA DE PEDIDO 131043202")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTimb|iTiDE","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTimb|dDesTiDE","Factura electrnica")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTimb|dNumTim","18889014")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTimb|dEst","059")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTimb|dPunExp","001")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTimb|dNumDoc","0015010")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTimb|dFeIniT","2022-05-25")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|dFeEmiDE","2022-09-15T10:22:57")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gOpeCom|iTipTra","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gOpeCom|dDesTipTra","Venta de mercadera")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gOpeCom|iTImp","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gOpeCom|dDesTImp","IVA")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gOpeCom|cMoneOpe","PYG")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gOpeCom|dDesMoneOpe","Guarani")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dRucEm","80022877")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dDVEmi","4")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|iTipCont","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|cTipReg","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dNomEmi","ABCDEF SA")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dNomFanEmi","ABCDEF SA")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dDirEmi","Jos Abcde Xyz N 666 e/Abxyz123")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dNumCas","0")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dCompDir1","N/A")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dCompDir2","N/A")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|cDepEmi","12")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dDesDepEmi","CENTRAL")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|cDisEmi","153")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dDesDisEmi","CAPIATA")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|cCiuEmi","1234")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dDesCiuEmi","CAPIATA")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dTelEmi","(022) 1111 000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dEmailE","somebody@example.com.py")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|dDenSuc","PUNTO 99")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|gActEco|cActEco","47721")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gEmis|gActEco|dDesActEco","COMERCIO AL POR MENOR DE PRODUCTOS")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|iNatRec","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|iTiOpe","2")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|cPaisRec","PRY")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|dDesPaisRe","Paraguay")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|iTiContRec","2")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|dRucRec","80082971")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|dDVRec","9")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|dNomRec","XXXXXXX")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|dNomFanRec","XXXXXXX")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|dNumCasRec","0")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDatGralOpe|gDatRec|dCodCliente","9999999")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamFE|iIndPres","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamFE|dDesIndPres","Operacin presencial")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|iCondOpe","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|dDCondOpe","Contado")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni|iTiPago","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni|dDesTiPag","Efectivo")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni|dMonTiPag","100000.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni|cMoneTiPag","PYG")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni|dDMoneTiPag","Guarani")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni[1]|iTiPago","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni[1]|dDesTiPag","Efectivo")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni[1]|dMonTiPag","73600.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni[1]|cMoneTiPag","PYG")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamCond|gPaConEIni[1]|dDMoneTiPag","Guarani")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|dCodInt","818181")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|dDesProSer","Widget Abc Xyz")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|cUniMed","77")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|dDesUniMed","UNI")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|dCantProSer","2.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gValorItem|dPUniProSer","16500.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gValorItem|dTotBruOpeItem","33000.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gValorItem|gValorRestaItem|dDescItem","3300.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gValorItem|gValorRestaItem|dPorcDesIt","20.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gValorItem|gValorRestaItem|dTotOpeItem","26400.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gCamIVA|iAfecIVA","1")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gCamIVA|dDesAfecIVA","Gravado IVA")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gCamIVA|dPropIVA","100")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gCamIVA|dTasaIVA","5")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gCamIVA|dBasGravIVA","25142.8571")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gDtipDE|gCamItem|gCamIVA|dLiqIVAItem","1257.1429")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dSubExe","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dSub5","26400.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dSub10","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dTotOpe","26400.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dTotDesc","6600.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dTotDescGlotem","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dTotAntItem","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dTotAnt","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dPorcDescTotal","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dDescTotal","6600.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dAnticipo","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dRedon","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dTotGralOpe","26400.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dIVA5","1257.1429")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dIVA10","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dTotIVA","1257.1429")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dBaseGrav5","25142.8571")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dBaseGrav10","0.0000")
    CkXml::ckUpdateChildContent(xmlToSign,"DE|gTotSub|dTBasGraIVA","25142.8571")

    gen.i = CkXmlDSigGen::ckCreate()
    If gen.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXmlDSigGen::setCkSigLocation(gen, "rDE")
    CkXmlDSigGen::setCkSigLocationMod(gen, 0)
    CkXmlDSigGen::setCkSigNamespacePrefix(gen, "")
    CkXmlDSigGen::setCkSigNamespaceUri(gen, "http://www.w3.org/2000/09/xmldsig#")
    CkXmlDSigGen::setCkSignedInfoCanonAlg(gen, "C14N")
    CkXmlDSigGen::setCkSignedInfoDigestMethod(gen, "sha256")

    ; -------- Reference 1 --------
    xml1.i = CkXml::ckCreate()
    If xml1.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::setCkTag(xml1, "Transforms")
    CkXml::ckUpdateAttrAt(xml1,"Transform",1,"Algorithm","http://www.w3.org/2000/09/xmldsig#enveloped-signature")
    CkXml::ckUpdateAttrAt(xml1,"Transform[1]",1,"Algorithm","http://www.w3.org/2001/10/xml-exc-c14n#")

    CkXmlDSigGen::ckAddSameDocRef2(gen,"01800228774059001001501012022091516941989060","sha256",xml1,"")

    ; Provide a certificate + private key. (PFX password is test123)
    cert.i = CkCert::ckCreate()
    If cert.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkCert::ckLoadPfxFile(cert,"qa_data/pfx/cert_test123.pfx","test123")
    If success <> 1
        Debug CkCert::ckLastErrorText(cert)
        CkXml::ckDispose(xmlToSign)
        CkXmlDSigGen::ckDispose(gen)
        CkXml::ckDispose(xml1)
        CkCert::ckDispose(cert)
        ProcedureReturn
    EndIf

    CkXmlDSigGen::ckSetX509Cert(gen,cert,1)

    CkXmlDSigGen::setCkKeyInfoType(gen, "X509Data")
    CkXmlDSigGen::setCkX509Type(gen, "Certificate")

    ; Load XML to be signed...
    sbXml.i = CkStringBuilder::ckCreate()
    If sbXml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::ckGetXmlSb(xmlToSign,sbXml)

    CkXmlDSigGen::setCkBehaviors(gen, "IndentedSignature")

    ; Sign the XML...
    success = CkXmlDSigGen::ckCreateXmlDSigSb(gen,sbXml)
    If success <> 1
        Debug CkXmlDSigGen::ckLastErrorText(gen)
        CkXml::ckDispose(xmlToSign)
        CkXmlDSigGen::ckDispose(gen)
        CkXml::ckDispose(xml1)
        CkCert::ckDispose(cert)
        CkStringBuilder::ckDispose(sbXml)
        ProcedureReturn
    EndIf

    ; -----------------------------------------------

    ; Save the signed XML to a file.
    success = CkStringBuilder::ckWriteFile(sbXml,"c:/temp/qa_output/signedXml.xml","utf-8",0)

    Debug CkStringBuilder::ckGetAsString(sbXml)

    ; ----------------------------------------
    ; Verify the signatures we just produced...
    verifier.i = CkXmlDSig::ckCreate()
    If verifier.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkXmlDSig::ckLoadSignatureSb(verifier,sbXml)
    If success <> 1
        Debug CkXmlDSig::ckLastErrorText(verifier)
        CkXml::ckDispose(xmlToSign)
        CkXmlDSigGen::ckDispose(gen)
        CkXml::ckDispose(xml1)
        CkCert::ckDispose(cert)
        CkStringBuilder::ckDispose(sbXml)
        CkXmlDSig::ckDispose(verifier)
        ProcedureReturn
    EndIf

    numSigs.i = CkXmlDSig::ckNumSignatures(verifier)
    verifyIdx.i = 0
    While verifyIdx < numSigs
        CkXmlDSig::setCkSelector(verifier, verifyIdx)
        verified.i = CkXmlDSig::ckVerifySignature(verifier,1)
        If verified <> 1
            Debug CkXmlDSig::ckLastErrorText(verifier)
            CkXml::ckDispose(xmlToSign)
            CkXmlDSigGen::ckDispose(gen)
            CkXml::ckDispose(xml1)
            CkCert::ckDispose(cert)
            CkStringBuilder::ckDispose(sbXml)
            CkXmlDSig::ckDispose(verifier)
            ProcedureReturn
        EndIf

        verifyIdx = verifyIdx + 1
    Wend
    Debug "All signatures were successfully verified."


    CkXml::ckDispose(xmlToSign)
    CkXmlDSigGen::ckDispose(gen)
    CkXml::ckDispose(xml1)
    CkCert::ckDispose(cert)
    CkStringBuilder::ckDispose(sbXml)
    CkXmlDSig::ckDispose(verifier)


    ProcedureReturn
EndProcedure
 

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